Promoter specific methylation of the dopamine transporter gene is altered in alcohol dependence and associated with craving

被引:99
|
作者
Hillemacher, Thomas [1 ]
Frieling, Helge [1 ]
Hartl, Thomas [1 ]
Wilhelm, Julia [1 ]
Kornhuber, Johannes [1 ]
Bleich, Stefan [1 ]
机构
[1] Univ Erlangen Nurnberg, Dept Psychiat & Psychotherapy, D-91054 Erlangen, Germany
关键词
Epigenetics; DNA methylation; Dopamine transporter; DAT; Alcohol dependence; Craving; COMPULSIVE DRINKING SCALE; ALPHA SYNUCLEIN PROMOTER; VENTRAL TEGMENTAL AREA; DNA HYPERMETHYLATION; HOMOCYSTEINE LEVELS; ETHANOL; HYPOMETHYLATION; SCHIZOPHRENIA; EXPRESSION; HISTORY;
D O I
10.1016/j.jpsychires.2008.04.006
中图分类号
R749 [精神病学];
学科分类号
100205 ;
摘要
Dopaminergic neurotransmission plays a crucial role in the genesis and maintenance of alcohol dependence. Epigenetic regulation via promoter specific DNA methylation of the dopamine transporter gene (DAT) may influence altered dopaminergic neurotransmission in alcoholism. Aim of the present study was to investigate DNA promoter methylation of DAT in early alcohol withdrawal and in relation to alcohol craving. We analyzed blood samples of 76 patients admitted for detoxification treatment and compared them to 35 healthy controls. Methylation specific quantitative real-time PCR was used to measure the promoter specific DNA methylation of the dopamine transporter. We assessed the extent of alcohol craving using the obsessive compulsive drinking scale (OCDS). Compared to healthy controls we found a significant hypermethylation of the DAT-promoter (Mann-Whitney U-test: p = 0.001). Ln-transformed methylation of the DAT-promoter was negatively associated with the OCDS (linear regression: Beta = -0.275, p = 0.016), particularly with the obsessive subscale (Beta = -0.300, p = 0.008). Findings of the present study show that the epigenetic regulation of the DAT-promoter is altered in patients undergoing alcohol withdrawal. Furthermore, hypermethylation of the DAT-promoter may play all important role in dopaminergic neurotransmission and is associated with decreased alcohol craving. (C) 2008 Elsevier Ltd. All rights reserved.
引用
收藏
页码:388 / 392
页数:5
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